• synonyms


  1. a granular igneous rock consisting of a mix of light and dark minerals, the former being calcic plagioclase feldspars, and the latter orthorhombic pyroxenes.
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Origin of norite

From the Norwegian word norit, dating back to 1875–80. See Norway, -ite1
Related formsnor·it·ic [naw-rit-ik] /nɔˈrɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for norite

Historical Examples of norite

  • Near the ores there are likely to be granitic rocks, which, like the ores, seem to be segregations from the norite magma.

    The Economic Aspect of Geology

    C. K. Leith

  • In New York the emery deposits are segregations of aluminum and iron oxides in norite (a basic igneous rock).

  • In Canada great portions of the eastern portion of the Dominion are formed of gabbros, norite, anorthosite and allied rock types.

British Dictionary definitions for norite


  1. a variety of gabbro composed mainly of hypersthene and labradorite feldspar
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Word Origin for norite

C19: from Norwegian norit, from Norge Norway + -it -ite 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

norite in Science


  1. See gabbro.
  2. A coarse-grained igneous rock, very similar to gabbro but containing orthopyroxene instead of clinopyroxene.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.